Elbow and forearm

Question 1

O and I of the biceps brachii

Answer 1

Origin- Long head: Supraglenoid tubercle of the scapula, Short head: Coracoid process of the scapula
Insertion - Radial tuberosity of the radius

Question 2

Concentric actions of the biceps brachii

Answer 2

Elbow flexion, and forearm supination

Question 3

Brachialis O and I

Answer 3

Origin - Distal half of the anterior shaft of the humerus
Insertion - Coronoid process of the ulna

Question 4

Concentric action of the brachialis and brachioradialis

Answer 4

Elbow flexion

Question 5

Concentric action of the pronator teres and pronator quadratus

Answer 5

Forearm pronation

Question 6

Triceps O and I

Answer 6

Origin - Long head - Infraglenoid tubercle of the scapula
* Lateral head - Upper ½ of the posterior surface of the humerus
* Medial head - Distal ½ of the posterior surface of the humerus
Insertion - Olecranon process of the ulna

Question 7

Concentric action of the triceps

Answer 7

Elbow extension

Question 8

Concentric action of the Anconeus

Answer 8

Elbow extension

Question 9

Concentric action of the supinator

Answer 9

Supination

Question 10

The elbow joint can be thought of as two interrelated joints: the

Answer 10

ulnohumeral and radiohumeral joints

Question 11

The articulations between the radius and ulna are often referred to as the…

Answer 11

forearm
* Proximal radioulnar joint
* Distal radioulnar joint

Question 12

What are superior to the medial and lateral epicondyles of the humerus

Answer 12

The medial and lateral ridges supracondylar formed between the diaphysis and epicondyles

Question 13

Where is the capitulum

Answer 13

The smooth round articular surface just distal to the lateral epicondyle

Question 14

Where is the trochlea

Answer 14

The smooth spool shaped articular surface located medial to the capitulum

Question 15

Where is the coranoid fossa

Answer 15

Located on the anterior humerus between the medial and lateral epicondyles

Question 16

Where is the radial fossa

Answer 16

Located lateral to the coronoid fossa on the anterior humerus

Question 17

Where is the trochlear notch

Answer 17

The large C-shaped notch in the proximal end of the ulna
The trochlear notch articulates with the trochlea of the humerus

Question 18

Where is the coranoid process

Answer 18

The small triangular shaped process on the very anterior portion of the
trochlear notch

Question 19

Where is the radial notch

Answer 19

The notch just lateral to the coronoid process

Question 20

Ulnohumeral joint articulating bones

Answer 20

Trochlea of the humerus and trochlear notch of the ulna

Question 21

Ulnohumeral joint Diarthrodial joint subdivision

Answer 21

Uniaxial, hinge type synovial jointR

Question 22

Radiohumeral joint articulating bones

Answer 22

Head of the radius and Capitulum of the humerus

Question 23

Radiohumeral diarthrodial joint subdivision

Answer 23

We will go with biaxial combined hinge and pivot type synovial joint

Question 24

Function of the ulnar (medial) collateral ligament

Answer 24

Critical in providing medial (valgus) stability to the elbow joint by limiting abduction of the elbow joint

Question 25

Function of the radial (lateral) collateral ligament

Answer 25

Provides lateral (varus) stability to the elbow joint
Limits adduction of the elbow joint

Question 26

What kind of sports is the ulnar collateral ligament usually injured in, and what is the surgery named with a torn UCL?

Answer 26

The ulnar collateral ligament is commonly injured in overhead
throwing sports (e.g. baseball)
* The anterior band is the most commonly injured band
* The surgery associated with torn UCL is the “Tommy John” surgery that
you hear a lot about in baseball, especially in pitchers

Question 27

What is the most common injury associated with RCL tears

Answer 27

The radial collateral ligament is not commonly injured. If it is injured, it is
usually associated with an elbow dislocation

Question 28

Proximal radioulnar joint articulating bones

Answer 28

Head of the radius and Radial notch on the ulna

Question 29

Prox radioulnar joint Diarthrodial joint subdivision

Answer 29

Uniaxial, pivot type synovial joint

Question 30

Annular ligament function

Answer 30

Holds the head of the radius in the radial notch of the ulna

Question 31

Interosseous membrane function

Answer 31

It runs between the radius and ulna and Holds the two structures together
Transmits force from the hand to the two bones

Question 32

Distal radioulnar joint articulating bones

Answer 32

Ulnar notch on the radius and the The round head of the ulna

Question 33

Distal radioulnar joint Diarthrodial joint subdivision

Answer 33

Uniaxial, pivot type synovial joint

Question 34

2 ligaments of the distal radioulnar joint

Answer 34

Dorsal (posterior side of the forearm) radioulnar
Volar (anterior side of the forearm) radioulnar ligaments